Use correct name for composer LWRP

This probably wasn't working properly before because the cookbook name
was missing from metadata.rb
Default max_execution_time should be 0

"-1" is not a valid value. PHP actually changes this to 0 when running,
but we should still set the correct value in the config.
Add test-kitchen tests for recipes

Excludes the ZeroMQ recipe, which can't be tested without ZeroMQ being
pre-installed on the machine.
Additional platforms for integration tests

These should cover most debian and redhat-based distros
Add epel repository for RedHat-based distros

Some of the php components are only available here
Fix issue with php extension folder on RedHat distros
Fix fpm pool directory on RedHat distros
Clean up package name selections in recipes

Some of these were actually broken on CentOS
Add documentation for php_fpm_pool resource
Add integration test for Debian Squeeze with dotdeb
Fix for extension dir path on debian dotdeb

With PHP 5.4, the default path to the extension folder changed, as the
Zend API has been updated.
Update list of supported platforms

This is a more accurate representation of what will actually work,
based on testing.
Update readme with details on tested platforms